The music on the site is from an embedded youtube player. It can be turned off by pausing the video, by clicking on it. It can be easily missed because it isn’t a standard youtube player, and because the video consists of a number of quotes rather than action shots.

Oh no! Another professional atheist grouping. Seriously, it’s time to get over the “there is no god” phase (that’s obvious anyway) and think more practically about what to do in the real world.
Check out Human Rights organisations such as Amnesty International to help to make the world save from fundamentalists or at least join some Humanist organisation that lobbies against state funded religious indoctrination. There is so much to do.

“We may be confused about the distinction between tolerance and the refusal of evaluation, thinking that tolerance of others requires us not to evaluate what they do.”
Martha Nussbaum
—Cultivating Humanity